Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
thien hoat » trien hoat, thien thuat, tien hoa
tinh dung » trinh dung, tin dung, tinh huong
dung quan » dung quang, dung luan, luong quan
kiem soat » kiem toan
hieu soat » hieu suat, hieu hoat, hieu luat
quan van » luan van, quan va, quan luan
van hieu » cao hieu
quan vi » quan li, quan tri, quan doi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh dung quan vi ((kiem soat) or (thien hoat)) ) or ( tinh quang quan van hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung quan vi ((kiem soat) OR (thien hoat)) ) OR ( tinh quang quan van hieu soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung quan vi ((kiem soat) or (thien hoat)) ) or ( tinh quang quan van hieu soat ))*.